ST25R3912 datasheet(78/130 Pages) STMICROELECTRONICS

Part #	ST25R3912

Description	High performance HF reader / NFC initiator for payment applications with 1 W output power

PDF	130 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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ST25R3912

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DS11794 Rev 9

1.3.9

Stream mode definition register

Address: 08h

Type: RW

Table 32. Stream mode definition register(1)

Bit

Name

Default

Function

Comments

scf1

Refer to Table 33

Sub-carrier frequency definition for Sub-

carrier and BPSK stream mode

scf0

scp1

scp0

Number of pulses

Number of sub-carrier pulses in report period

for Sub-carrier and BPSK stream mode

1 (BPSK only)

scp0

2stx2

Refer to Table 34

Definition of time period for Tx modulator

control (for Sub-carrier and BPSK stream

mode)

1stx1

0stx0

1. Default setting takes place at power-up and after Set default command.

Table 33. Sub-carrier frequency definition for Sub-Carrier and BPSK stream mode

scf1

scf0

Sub-carrier mode

BPSK mode

fc / 64 (212 kHz)

fc / 16 (848 kHz)

fc / 32 (424 kHz)

Not used

fc / 16 (848 kHz)

Not used

Table 34. Definition of time period for Stream mode Tx modulator control

stx2

stx1

stx0

Time period

fc / 128 (106 kHz)

fc / 64 (212 kHz)

fc / 32 (424 kHz)

fc / 16 (848 kHz)

Not used

ST25R3912 Datasheet(PDF) 78 Page - STMicroelectronics

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